def __init__(self):
super(ApplyForce, self).__init__()
self.world.gravity = (0.0, 0.0)
# The boundaries
ground = self.world.CreateBody(position=(0, 20))
ground.CreateEdgeChain(
[(-20, -20),
(-20, 20),
(20, 20),
(20, -20),
(-20, -20)]
)
# TODO: make note of transform.R.set() -> transform.angle =
xf1 = b2Transform()
xf1.angle = 0.3524 * b2_pi
xf1.position = xf1.R * (1.0, 0.0)
xf2 = b2Transform()
xf2.angle = -0.3524 * b2_pi
xf2.position = xf2.R * (-1.0, 0.0)
self.body = self.world.CreateDynamicBody(
position=(0, 2),
angle=b2_pi,
angularDamping=5,
linearDamping=0.1,
shapes=[b2PolygonShape(vertices=[xf1 * (-1, 0), xf1 * (1, 0),
xf1 * (0, .5)]),
b2PolygonShape(vertices=[xf2 * (-1, 0), xf2 * (1, 0),
xf2 * (0, .5)])],
shapeFixture=b2FixtureDef(density=2.0),
)
gravity = 10.0
fixtures = b2FixtureDef(shape=b2PolygonShape(box=(0.5, 0.5)),
density=1, friction=0.3)
for i in range(10):
body = self.world.CreateDynamicBody(
position=(0, 5 + 1.54 * i), fixtures=fixtures)
# For a circle: I = 0.5 * m * r * r ==> r = sqrt(2 * I / m)
r = sqrt(2.0 * body.inertia / body.mass)
self.world.CreateFrictionJoint(
bodyA=ground,
bodyB=body,
localAnchorA=(0, 0),
localAnchorB=(0, 0),
collideConnected=True,
maxForce=body.mass * gravity,
maxTorque=body.mass * r * gravity
)
def __init__(self):
super(ApplyForce, self).__init__()
self.world.gravity = (0.0, 0.0)
# The boundaries
ground = self.world.CreateBody(position=(0, 20))
ground.CreateEdgeChain(
[(-20, -20),
(-20, 20),
(20, 20),
(20, -20),
(-20, -20)]
)
# TODO: make note of transform.R.set() -> transform.angle =
xf1 = b2Transform()
xf1.angle = 0.3524 * b2_pi
xf1.position = xf1.R * (1.0, 0.0)
xf2 = b2Transform()
xf2.angle = -0.3524 * b2_pi
xf2.position = xf2.R * (-1.0, 0.0)
self.body = self.world.CreateDynamicBody(
position=(0, 2),
angle=b2_pi,
angularDamping=5,
linearDamping=0.1,
shapes=[b2PolygonShape(vertices=[xf1 * (-1, 0), xf1 * (1, 0),
xf1 * (0, .5)]),
b2PolygonShape(vertices=[xf2 * (-1, 0), xf2 * (1, 0),
xf2 * (0, .5)])],
shapeFixture=b2FixtureDef(density=2.0),
)
gravity = 10.0
fixtures = b2FixtureDef(shape=b2PolygonShape(box=(0.5, 0.5)),
density=1, friction=0.3)
for i in range(10):
body = self.world.CreateDynamicBody(
position=(0, 5 + 1.54 * i), fixtures=fixtures)
# For a circle: I = 0.5 * m * r * r ==> r = sqrt(2 * I / m)
r = sqrt(2.0 * body.inertia / body.mass)
self.world.CreateFrictionJoint(
bodyA=ground,
bodyB=body,
localAnchorA=(0, 0),
localAnchorB=(0, 0),
collideConnected=True,
maxForce=body.mass * gravity,
maxTorque=body.mass * r * gravity
)
def __init__(self):
super(Distance, self).__init__()
# Transform A -- a simple translation/offset of (0,-0.2)
self.transformA = b2Transform()
self.transformA.SetIdentity()
self.transformA.position = (0, -0.2)
# Transform B -- a translation and a rotation
self.transformB = b2Transform()
self.positionB = b2Vec2(12.017401, 0.13678508)
self.angleB = -0.0109265
self.transformB.Set(self.positionB, self.angleB)
# The two shapes, transformed by the respective transform[A,B]
self.polygonA = b2PolygonShape(box=(10, 0.2))
self.polygonB = b2PolygonShape(box=(2, 0.1))
def __init__(self):
super(Distance, self).__init__()
# Transform A -- a simple translation/offset of (0,-0.2)
self.transformA = b2Transform()
self.transformA.SetIdentity()
self.transformA.position = (0, -0.2)
# Transform B -- a translation and a rotation
self.transformB = b2Transform()
self.positionB = b2Vec2(12.017401, 0.13678508)
self.angleB = -0.0109265
self.transformB.Set(self.positionB, self.angleB)
# The two shapes, transformed by the respective transform[A,B]
self.polygonA = b2PolygonShape(box=(10, 0.2))
self.polygonB = b2PolygonShape(box=(2, 0.1))
